失败的尝试
https://blog.csdn.net/cffishappy/article/details/80182935
https://askubuntu.com/questions/271388/how-to-install-gcc-4-8
make[6]: Leaving directory '/gcc-4.8.5/build/x86_64-unknown-linux-gnu/libstdc++-v3/src'
make[5]: Leaving directory '/gcc-4.8
